Last updated: June 2026. Sources: HomeOwners Alliance (HOA) lender survey; BBC reporting; House of Commons Library research briefing on spray foam insulation.
Lender criteria change frequently — always confirm current policy with an independent mortgage broker before making any decision. This page is general information, not financial advice.
Quick Answer — Last Updated June 2026
As of June 2026, the picture for homeowners with spray foam insulation looks like this, based on the HomeOwners Alliance lender survey and BBC reporting:
- Over 50 lenders restrict lending on spray foam properties in some form.
- Approximately 75% of providers surveyed by the HomeOwners Alliance either refuse outright or require substantial specialist reports before they will consider a case.
- All equity-release providers surveyed declined to lend on homes with spray foam still in situ.
- TSB has stated it will not approve new mortgages on spray foam properties; it considers existing customers case-by-case.
- Most other high-street lenders sit in a “case-by-case with paperwork” category — meaning they may lend if a qualified specialist’s report confirms the foam has not caused structural harm, and in some cases if the foam is professionally removed.
- An independent inspection under the PCA Spray Foam Inspection Protocol is the required starting point regardless of which lender you approach.
Sources: HomeOwners Alliance lender survey; BBC coverage; House of Commons Library research briefing on spray foam insulation.
How to Read This Table
Each lender is assigned one of three policy labels. These reflect the most commonly reported position as of June 2026 — they are not guarantees and will vary by property, foam type, survey outcome, and individual underwriter decision.
- Refuse — the lender is reported not to lend on properties with spray foam insulation present in most or all cases. A RICS-verified removal certificate may reopen consideration.
- Case-by-case (with paperwork) — the lender may consider the application if the borrower provides an independent specialist inspection report, and often evidence of removal or remediation. Outcome is not guaranteed.
- Equity release: decline — all equity-release providers in the HOA survey declined. This applies specifically to lifetime mortgages and home reversion plans.
UK Mortgage Lender Spray Foam Policy Table (June 2026)
Note: Policies shown are based on the HomeOwners Alliance / BBC lender survey and publicly reported positions, framed as of June 2026. They are directional, not absolute, and may change without notice. Always verify directly with the lender or through a broker.
| Lender | Policy | Notes | Last updated |
|---|---|---|---|
| TSB | Refuse (new) / case-by-case (existing) | Reported not to approve new mortgage applications on spray foam properties. Existing TSB mortgage holders may be considered case-by-case with a specialist survey. As of June 2026, per HOA / BBC survey. | June 2026 |
| Halifax / Bank of Scotland (Lloyds Banking Group) | Case-by-case with paperwork | Reported to require an independent specialist report; removal may be required before approval. As of June 2026, per HOA survey. | June 2026 |
| Nationwide Building Society | Case-by-case with paperwork | Reported to require a specialist report; removal and a RICS-verified certificate are often needed before proceeding. As of June 2026, per HOA / BBC survey. | June 2026 |
| Barclays | Case-by-case with paperwork | Reported to flag spray foam at valuation and assess case-by-case, usually requiring a specialist report. As of June 2026, per HOA survey. | June 2026 |
| NatWest / RBS | Case-by-case with paperwork | Reported to treat spray foam properties as non-standard and require a specialist report; removal and a removal certificate improve prospects. As of June 2026, per HOA survey. | June 2026 |
| HSBC UK | Case-by-case with paperwork | Reported to flag spray foam as a material risk and require a specialist report before a decision. As of June 2026, per HOA survey. | June 2026 |
| Santander UK | Case-by-case with paperwork | Reported to require a specialist inspection and, in many cases, evidence of removal. As of June 2026, per HOA survey. | June 2026 |
| Virgin Money / Clydesdale | Case-by-case with paperwork | Reported in broker feedback to often require removal and a RICS-verified removal certificate before lending. As of June 2026, per HOA survey and broker reports. | June 2026 |
| Skipton Building Society | Case-by-case with paperwork | Reported to treat spray foam properties as non-standard; a specialist report is the minimum requirement. As of June 2026, per HOA survey. | June 2026 |
| Leeds Building Society | Case-by-case with paperwork | Reported to refer spray foam properties for specialist valuation; cases considered individually. As of June 2026, per HOA survey. | June 2026 |
| Equity-release providers (all surveyed) | Decline / equity release | All equity-release providers surveyed by the HomeOwners Alliance declined on spray foam properties. Removal and a verified certificate are typically required to restore eligibility. As of June 2026. | June 2026 |
Table sources: HomeOwners Alliance lender survey; BBC reporting; House of Commons Library briefing on spray foam insulation; broker-reported outcomes. Policies are directional, not absolute, and reflect the reported position as of June 2026.
Lender-by-Lender Notes
TSB Spray Foam Mortgage Policy
TSB is the lender that has gone furthest in setting an explicit policy. As of June 2026, based on the HOA / BBC survey, TSB will not approve new purchase or remortgage applications on properties where spray foam insulation is present in the roof space — making TSB effectively a “refuse” lender for anyone buying or switching to them on a spray foam property. Existing TSB customers who already hold a mortgage and wish to switch to a new deal (a product transfer) may be considered on a case-by-case basis, usually requiring a qualified surveyor’s inspection. If you are selling a TSB-mortgaged property, your buyer’s lender — not TSB — will be the deciding factor. Always confirm the current position with an independent broker.
Halifax Spray Foam Mortgage Policy
Halifax (part of Lloyds Banking Group, which also includes Bank of Scotland and Lloyds Bank) does not publish a flat refusal policy, but in practice spray foam is reported to be treated as a significant risk flag. The valuer will typically note the foam’s presence, and an independent specialist’s report is usually required; in some cases approval is conditional on removal and remediation. As of June 2026, per HOA survey and broker-reported outcomes. Confirm current policy with a broker.
Nationwide Spray Foam Mortgage Policy
Nationwide Building Society, the UK’s largest building society, has been reported as requiring a specialist report before it will consider lending on a spray foam property, and in many broker-reported cases as proceeding only after the foam was professionally removed and a RICS-verified removal certificate was provided. Homeowners approaching Nationwide should budget for an inspection first and should not assume the property will be accepted in its current state. As of June 2026, per HOA / BBC survey.
NatWest / RBS Spray Foam Mortgage Policy
NatWest Group (including NatWest and RBS) has been reported to classify spray foam properties as non-standard construction, which triggers additional underwriting scrutiny. A specialist report is generally the minimum requirement, and many borrowers find lenders in this group proceed only once the foam has been removed and a clean certificate issued. If you are remortgaging or purchasing through NatWest, instruct an independent PCA-protocol inspection before applying so you understand your property’s status. As of June 2026, per HOA survey.
Methodology & Sources
This page draws on the following sources. We do not invent or estimate figures:
- HomeOwners Alliance (HOA) lender survey — a publicly available survey of UK lender attitudes to spray foam insulation, covering over 50 providers. The HOA found that approximately 75% of lenders either refuse or require specialist evidence, and that all equity-release providers surveyed declined.
- BBC reporting — the BBC has covered the spray foam mortgage issue, including interviews with lenders, homeowners, and surveyors.
- House of Commons Library — published a research briefing on spray foam insulation and the mortgage market, drawing on government and industry data including the estimate of approximately 250,000 affected UK homes, many installed under the Green Homes Grant.
- Property Care Association (PCA) — the trade body for the remediation industry; its Spray Foam Inspection Protocol (2023) sets a standard for independent inspection, supported by a register of surveyors.
- RICS — Royal Institution of Chartered Surveyors; removal certificates verified under RICS standards are widely recognised by lenders.
- Broker-reported outcomes — individual case outcomes reported by independent mortgage brokers, used directionally where lenders have not published explicit policies.
This page is reviewed and updated regularly. Policies change; always verify current criteria with an independent broker or directly with your lender.
What to Do If Your Lender Refuses
A lender refusal does not mean the situation is irreversible. The recommended steps — in order — are:
- Get an independent inspection first. An inspection under the PCA Spray Foam Inspection Protocol will tell you whether the foam has caused structural damage to your roof timbers and whether removal is actually necessary. Removal is common but not always required — do not proceed to removal without an inspection.
- If removal is recommended, obtain quotes. Guide ranges: open-cell foam £25–40/m²; closed-cell foam £40–65/m²; a typical 100m² loft £2,800–£8,000, depending on access and complexity. These are guide ranges — a site survey gives a fixed price. See our removal cost guide or use the cost calculator.
- Obtain a RICS-verified removal certificate. A removal certificate from ~£349 provides independent confirmation that the foam has been professionally removed and that the roof structure is sound — the document most lenders and equity-release providers require.
- Consult an independent mortgage broker. A whole-of-market broker can identify which lenders are currently considering spray foam properties (with or without removal) and which require specific documentation. See also our guide on spray foam and mortgages.
- Re-apply with evidence. Armed with an inspection report, removal certificate, and broker guidance, your options are substantially wider than they were with foam in situ.
This is general information, not financial or legal advice. Consult a qualified mortgage broker for advice specific to your circumstances.